What Drives Some Young Muslim Men To Violence?

It's been a week since the Boston Marathon bombing, and people are still wondering why they happened. Media sources have suggested possible motivations, like the suspects turning to radical Islam. Host Michel Martin gets perspective on how young Muslims are reacting to this case, and how Islamic extremists are spotted. She hears from AbdelRahman Murphy, a youth director at a Tennessee mosque; and Mohamed Elibiary, who works with radicalized Muslim youth.